Chainstitch inseam shoe sewing machine



Oct V A. R. MORRILL 2,332,657

CHAINSTITCH INSEAM SHOE SEWING MACHINE Original Filed April 1, 1937 8 Sheets-Sheet 1 Oct. 26, 1943. MORRlLL 2,332,657

CHAINSTITCH I NSEAM SHOE SEWING MACHINE I Original Filed April 1, 1937 8 Sheets-Sheet 2 Oct 1943- A. R. MOFIQRILL 2,332,657

CHAINSTITCH INSEAM SHOE SEWING MACHINE Original Filed April 1, 1937 8 Sheets -Sheet s Inventor 1943- A. R. MQRRILL. 2,332,657

CHAINSTITCH INSEAM SHOE SEWING MACHINE Original Filed A iil 1, 1957 8 Sheets-Sheet 4 Oct. 26, 1943. MORRlLL 2,332,657

CHAINSTITCH INSEAM SHOE SEWING MACHINE Original Filed April 1, 1937 8 Sheets-Sheet 6 Oct. 26, 1943. A. R. MORIIQILL 2,332,657

CHAINSTITCH INSEAM SEWING MACHINE Original Filed April 1, 1937 s Sheets-Sheet? Oct. 26, 1943. A, R Mom; 2,332,657

CHAINSTITCH INSEAM SHOE SEWING MACHINE Origipalfiled April 1, 1957 8 Sheets-Sheet 8 Patentedoct. 26, 1943 [2,332,651 CHAINSTITCH INSEAM snon SEWING MACHINE Alfred R. Merrill, Beverly, Mass, assignor to United Shoe Machinery Corporation, Borough ofFlemington, N. .L, a corporationof New Jer- Sey Original application Ap ril 1, 1937, serial No. 9

134,319. Dividedand this application January 30, 1940, Serial No.;316,385 a j 10 Claims. (01. 112-47) The present invention relates to inseam shoe sewing machines, and is herein shown as emboded in a curved hook needle chainstitch 'machine similar in many respects to the machines disclosed in applicants prior patents, No. 1,971,575

dated-August 28, 1934,. and No. 2,041,945 dated May 26, 1936. k v a An object of the present inventionis to provide a chainstitch inseam shoe sewing machine of that type in which the chain of the seam is laid in the channel of the insole, having an improved mechanism for feeding the work continuously during theinseam sewing operation.

Another object of the invention is to provide a chainstitch inseam shoe sewing machine of the type last referred to with an improved means for separating the awl from the needle at the completion of the sewing operation in order to facilitate the removal of the sewed shoe from the machine. 1

Other objects of the invention are, in general, to improve the construction and mode of operation'of the various parts of inseam shoe sewing machines, aswill hereinafter appear.

With'the above objects in. View, the present invention consists in the novel constructions, combinations and arrangements of parts hereinafter described and claimed, the advantages of which will be apparent to those skilledin the art'from the following description, taken in con nection with the accompanying drawings which illustrate a welt shoe sewing machine provided with specific embodiments of the several features of the invention. Referring to the drawings, Figure 1 isa view in side elevation of the head of the machine; Figure 2 is a plan view with a portion of the casing broken away to show, underlying parts; Figure 3' is a View in sectional elevation of a portion of the machine illustrating particularly the mechanism associated withthe cam shaft; Figure.4 is a detail sectional plan view with portions of the frame broken away; Figure 5 ,isa

detail vertical sectional view, taken on the line 5-5 of Figure 1, illustrating particularly the carriages for the needle and awl; Figure 6 is a detail sectional plan view, taken on the line 6-6 of Figure 5; Figure 7 is a detail cross sectional view, taken on the line l--1 of Figure 5; Figure 8 is a detail view in side elevation of thread handling devices adjacent the sewing point, illustrating the position of the parts at the start of the sewing operation; Figures 9, 10 and 11 are views similar toFigure 8,,with the machine frame and needle and awl carriages omittedQillustrating the position assumed by the; stitch forming, work feeding and welt and thread handling devices at different points inthe cycle of operations; Figure 12 isa detail view in front elevation of certain of the parts illustrated-in Figure 10; Figures 13. to inclusive are somewhat diagrammatic views, illustrating the positions assumed by the stitch forming, work feeding, and welt and thread handling devices during the first two cycles of stitch forming operations; Figure 21 .50 the' stitch-forming, work feeding and welt and is a detail sectional view. illustrating particularly the stop lever of the machine. and its operating cam; and Figures 22and23 are detail sectional views, looking in opposite directions, of the mechanism for separating the needle from the awl upon stopping the machine.

Except as pointed out herein and in applicants United States Letters Patent No. 2,220,112, granted November 5, 1940, on an applicationiser. No; 134,319 filed April 1, 1937, of which the present application is a division,.the various parts of the machine illustrated in thedrawings are constructed, arranged and operated as in the machine of applicant :prior Patent No. 2,041,945. The machineis provided with a curved hook needle 2, arranged, to enter the work fromthe channel side, a curved awll entering thework from the welt side, a thread finger 6, a looper 8, and a take-up, I0. Work piercing and retracting movements areimparted to the needle and awl, and thread handling movements are imparted to the thread finger, looper, and take-up from the cam shaft I2 through connections which are the same as thoseembodied in the machine of applicants prior Patent No. 2,041,945. The ,machineis also provided with a work rest and a welt guide constructed, arranged and actuated as in the machine of applicants prior Patent No. 2,041,945, with the exception that a separate cam lever i provided for actuating the locking pawl of the welt guide mechanism and is 'arranged to engage an arm projecting from one of the rear supporting links of the welt guide carrier. r

The driving and stopping mechanism of the machine illustrated in the drawings is also the same as that embodied in the machine of appli cants prior Patent No. 2,041,945 comprising a high speed treadle controlled clutch for driving the cam shaft from the vertical shaft l4, through the spiral gears l6" and I8 and an automatically controlled reversely driven slow speed clutch, the

driving member of which is formed in a gear 20 .1 1 mounted on the cam shaft. The driven V severing mechanism.

member of theslow speed clutch is indicated at 22. The timing cam by which it is moved into and out of engagement with the driven member of the clutch in stopping the machine is indicated at "'24:" The. b'ell' 'crankwhic'h is vibrated by the cam while the machine is in operation and 'riage for the awl being indicated at (see par ticularly Figs. 5, 6, 7 and 8). The carriages SZ which is controlled through connections to the starting and stopping treadle is indicated at 3t.

Y about which the needle and awl turn in piercing The gear 20 of the slow speed reverse driving and f. stopping clutch is continuously driven as in the" machineof applicant's prior patent, and through a similar train of connections Mechanism for stopping actuates the welt the machine also in..-

cludes the stop arm and cam follower of the mechanism disclosed in applicants prior Patent No.-2,041,945, the stop arm :(see more particularly Figure 21) being-indicated at 32, the follower at the outer endof the arm being indicated at 34,

d the camslot ina cam disk 36 on the cam shaft 'lz which is engaged by the follower during the reverse rotation of the cam shaft in stopping themachine being indicated at 38. The stop arm 3-2;thr'ough connections substantially the 'same'as tho'se embodied in the =machine of applicants prior-Patent No. 2,041,945, retracts the welt guide as the machine stops and also moves the devices which lockthe welt gripping and cutting mechanism out'cf operation while the machine is running =to a position which permits the welt gripping and' cutting mechanismv to be thrown into operation by a pull on thewelt. i The welt severingxand gripping devices cornprise welt and thread gripping jaws" 40 and t2 and-a welt and threadsevering knife 44 which, after the welt and thread have been gripped by the== jaws 10 and 42, is arranged to be. moved lengthwise of the jaws-across the welt and thread clamped bythe jaws. I t T-he new and improvedmeans for feeding the work continuously, with which the illustrated mas l chine has been provided, are best illustrated in Fig. 1, and in Figs. 4 to 11 inclusive. The work is 'fedby the cooperative action of the needle v2, the awl 4, an'd'a'ch'annel guide indicated at. Theneedle enters the work from thesame side 'of the work with-the work engaging end of the "channel guide and the awl enters the" work from the other side ata point displaced a stitch length from the needle. The channel guide remains continuously in engagemenuwith thebot'tom or the'channel having no moveni'ent except a move ment back and forth in "the line of feed, the tension of. the thread in the needle barb drawing the work against the channel guide each time the needle is retracted. The needle and awl-move towards and from'eachother into and out of engage'ment with the work, and also have a movement relatively to'each other back and forth in the line of feed, one or the other of these instruments, during the sewing of a seam, being in engagement with the work. During the movements of the needle and awl backand forth in the line of feed, the channel guide moves with the needle, always maintaining thesame fixed position with relation to the needle in the line of feed so that no variation in tension can occur in the thread when the needle is retracted due to relative feeding movement between the channel guide; and needle. The means for'supporting the needle-and awl in the machine comprise two carriages-inthe form of somewhat rectangular blocks,ithe carriage for the needle being indicated at 52, and the carand-T54 are meunted misuse-targe s: eeth in the line of feed -on a guide rodic whichpasses through perforations in the upper ends oi the f carriages.

areguided-gin slots formed in the frame of the mach'ine, the slots being provided with vertical Near their lower ends, the carriages guiding surfaces extending parallel with the axis the-worhandengaging corresponding'suriaces on 'the carriages; Ifhe needle and awl are clamped respectively on needle and awl segments158 and 260 and these segments are mounted in the lower l ends. of the carriages 52 and 54 soas to move about the same axis. .5 The needle segment 58 is mounted in the carriage 52 on a bearing block 62 which extends from the lower end of the carriage towardsthe. awl carriage. .Thechannel guide: 50- is secured to thebearirigxblock- 62 by mean'sct.

a clampingbolt 64 in position to engage the channel of ashoe soleclose-to the; side-of 1211811188!!! towards which the hshoeis "fed. To :insurexthe proper location of thechannel guidelwithoutz an;

particular care on the part of thebperatonthe bearing block 5215 provided withra projectmgstud '66 which is squareiin CIOSSrSGCtiDhzaflIldiWlliOhis received ina correspondinglyshapedhole inflthe' carriage 52; Thebearing ,block ,8'2;.is;-held rigidLy secured to the carriagefii by meansofva clamps ing bolt 68 threadedinto thecarriage and'engage ing the stud 65.. A neeclleguide,indicatedat ,10, is also mounted on. the bearingyblock fl between ashoulder .formed on the block and the-hub. of

the needle segment. This-needle guide'iyactu'y ated .from'the needle segment through connec .tions similar tog-those disclosed in applicants prior patents comprising a locking ball indicatedlat: H mounted in the needle guide and arranged to engage cooperating recesses in th needle seg v ment and in the surface of the shoulder onluthc bearing block. Tomountthc-awlsegmentin the awl carriage, itis RrOVidedj'Qn: OPPOSitQgSidES with hearing studs, one o-f ,whic'hiis ereceived in 1' perforation ingthe bearing b lock 62; for theneedle anditheother of which is m'ountedgto turn; in. a

bearing in'the lower endrofthe carriage 54.5 ,The awl segment is held'from'lmoveme'nt withrelatlon tothe carriage. 54 indsheline of feed by'a'shoulder' and "80,- a; separatelever ibeingfiprovidedifw eachcarriage' andeach lever'beingactuated fmmll cam gro'ove 'in the cam dis'lc82, cnlthe canirshaft ll ofthe machine- Each leveit uatjt's forward end is rounded off .and 'engagesa vertical slots-in its corresponding marriage; a closedfltibeing; selcured by means.ofx'an adjusting screw.:8.-t.;arranged 5 to engage Q one. side of: the rounded end 'ofthe --lever and press the: otherlsidei against -tlw I oppositesideofthe slbt: 'J a:

Themanner'in which thetz'needle, 'awll iand channel guide act to impart 'axccntinucus feed:- i g .movement to the worlt will be. appar'entrimm an inspection hf li'igure's 5: to 20; inclusive} which shows the relative positiouoiitnese'parts atoning em-points in a 'stitch-formingicycle while his a machine issewing a seam. In Figure 18, the needle has been retracted from the work and the V awl'has piercedthe work, the parts' being in the same position as indicated'in Figure l5which' illustrates the operation during the first cycle on starting the machine. Afterstarting the machine, the thread is laid in thebarb of'the'needle, as in Fig. 16, and when thethreaded needle is retracted, the 3 positions of Fig. 17 are reached. With the parts in the position illustrated in Figure 18, the awl 'is feeding the work and the needle and channel guide are being backfed. In Figure 19 the needle has advancedthrough the work and the awl has been retracted-and backfedwhilethe needle is in the work; Withthe parts in this position th work is being fed by the needle and channel guide, and the awl is about to enter the work. At this time the looper 8 and thread finger 6 at the same side of the work with the awl act again to lay the thread in the needle barb, as in Fig. "16. Upon retraction of the threaded needle, a tension is imparted to the thread to draw the sewing rib of the shoe firmly against the channel guide. In Figure 20 the awl has entered the work and is feeding the work while the needle has been withdrawn and, together with the channel guide, is being backfed. I

To permit the shoe to be readily removed from the machine at the completion of the sewingoperation, and also to permit a new shoe to be placed in position, means are provided which,

upon stopping the machinewith the needle retracted from the work, act toiimpart additional retracting movement to the'awl so as toseparate the awl from the needle. Thisbrings the needle and awl into the positions indicated in Figure-13, in which position they remain until the machine has again started. The mechanism for imparting an additional retracting movement to the awl, upon stopping the machine, is best shown in Figures 3, .22 and 23. The awl actuating cam lever is indicated at 85 and the cam groove for actuating the lever. is indicated at 83, this cam groove being formed in one faceof the spiral-gear [8 through which the cam shaft isdriven. The lever 88 is provided with a follower 9ll which, during the rotation of the cam shaft in a forward direction, as indicated by the'arrow in Figure 23, remains in engagement with the cam groove 88. The cam groove 88 is shaped to give the desired work piercing and retracting movements to the awl during the sewing of the seam; Upon stopping the machine, a-reve'rse movement is imparted to the cam shaft 12 by th driving and stopping mechanism and, in the construction shown, this reverse movement is utilized to impart an additional retracting movement to the awl, this gretracting movement taking place while the needle is out offeng'agement with the work. To .impartthis additional retracting movement to the awl, the gear I8 is provided with an additional cam slot 92 leading from'the cam groove88 inwardly towards the cam shaft. Upon reverse rotation of the cam shaft, the follower Stenters the cam, slot '92 and, as the machine comes to rest, the lever 86 is actuated to retract the awl. The entrance of the follower 90 into the slot 92 during the reverse rotation of the cam shaft is insured by the provision of a switch cam 94 pivotally mounted on the gear l8 and normally held in a position to close the slot 92 and form a portion of one wall of the cam groove 88. During the reverse rotation of the cam shaft the switch cam is moved to the position indicated in Figure 23, in which position it extends across the cam groove 88 and openstheslot 92 for-the entrance of the follower 90. For soactuating the switch cam 94, a lever 96 is-mo'unted on the opposite face of the gear 18 from the switchcam and is provided with apin 98 extendingthrough an opening ,inthegeal into engagement with a lot in the switch cam. During the forward rotation of 'thecam shaft in sewing a seam, the switch cam is held in a position closing the slot 92 by means of a spring I00 actingon the lever 96. Upon reverse rotation of the cam shaft, the lever96 is actuated to move the switch camrfrom its closed position bymeans'of a camsurface on the upper end'of an-arm I02 which projects from the hub of the stop arm 34. This cam surface is normally out ofthe path of a pin I04 on the opposite end of the lever 96 from the pin 98, but upon actuation of the stop arm 34 in stopping the machine, the cam surface is moved into the path of the 'pin I04 and causes an actuation of the lever 96 to move the switch cam 94 to its open position before thecam shaft cornes to rest.

The nature and scope of the invention having been indicated, and a machine embodying the several features of the invention having been specifically described, what is claimed is:

1. A chainstitch inseam shoe sewing machine of that type in which the chain of the seam is laid in the channel of the insole having, in combination, stitch forming devices including a channel 7 guide fixed transversely of the direction of feed,

a curved hook needle arranged to enter the work from the same side of the work with thework engaging end of the channel guide and to draw the work against the channel guide by the tension on the thread when the threaded needle is retracted, an awl arranged to enter the work from the other side of the work from the work engaging end of thechannel guide, a needle looper and a thread finger cooperating with the looper at the same side of the work with the awl, and mechanism for actuating the awl to engage the work when the needle is disengaged and all of said parts to impart a continuous feeding movement tothe work comprising a carrier movable back and forth in the direction of feed upon which the awl is mounted, and a separate carrier movable back and forth in the direction of feed upon which the channel guide and needle are mounted.

2. A chainstitch inseam shoe sewing machine of that type in which the chain of the seam is laid in the channel of the insole having, in combination, stitch forming devices including a channel guide fixed transversely of the direction of feed, a curved hook needle arranged to enter the work from the same side of the work with the work engaging end of the channel guide and to draw the work against the channel guide by the tension on the thread when the threaded needle is retracted, an awl arranged to enter the work from the other side of the work from the work engaging end of the channel guide, a needle looper and a thread finger cooperating with the looper at the same side of the work with the awl, and mechanism for actuating the awl to engage the work when the needle is disengaged and all of said parts to impart a continuous feeding move-- ment to the work comprising a carrier movable back and forth in the direction of feed upon which the awl is mounted, and a separate carrier mov- :able back and forth in the direction of feed upon which the needle is mounted.

3. A chainstitch inseam shoe sewing machine of that type in which the chain of the seam is laid in the channel of the insole having, in comis retracted, an awlarranged: toenter the-Work from the'other side 301 the Work from the Work engaging end of the channel guide; a needle looper and a thread finger cooperating-Withtheylooper at the same side. of the work with the awl; and mechanism for actuating the awl to en age the work when the needle is disengaged and all of said parts to impart a continuous feeding movement to the Work, timed to backfeed the channel guide and the needle while the awlis in the work. t 1 t .t i

4. A chainstitch inseam shoe sewing machine of that type in which the chain of the seam is laid in the channel of the insole having, in com: bination, stitch forming'devices including a chant nel guide fixedtransversely of the vdirection of feed, a'curved hook needle arranged to enter the work from thesame side of the work withqthe work engaging end of the channel guide andto draw the work against the channel guide: by the tension on the threadzwhen the threaded needle is retracted, an awl arranged to.- enterthe work from theother side of the work from the work engagingend of the channel guide, a needlelooper and a thread finger cooperating with the loopeiuat the same side of the work with the awl, and 'mech anism for actuating-thegawl to enga e the work when the needle is disengaged and 'alltof said parts to impart a continuous feeding movement to the work timed to backfeed the awl while the needle is in the work. y V

5. A chainstitch inseam "shoe sewing machine having, in combination; stitch forming and work feeding devices including two carriagesia guide rod on which said carriages are mounted toslide back and forth in the line of feed, a curved hook needle mounted on one of said carriages to move about an axis extending in theclinenof :-feed, :a curved awl mounted on the other carriage .to move about an axis in alignment with the lneedleiaiiis, and a guideway for the carriages provided with guiding surfaces extending parallel with; "the needle and awl axes. Y

6; A' chainstitch' inseamshoe sewing :machine having, in combination, stitch forming devices, in cluding a curved hook needle arranged to-enter the work from the "channel-side; atcurved awl arranged to enter the workfrom the side .oppoe v aged by'the follower during forearm-creat oil slot indie, follower to" engage sioti 'n a;

the Work from the channel .side,- a curved awlar: ranged toJenter the ,work: from. :the side oppoe: site the channel; means comprising a, camshaft and suitable.connectionsifor imparting;

piercing andretractingw movements to the needle and awl duringweach stitch forming eycle z said connections including; an awl actuating cam me vided .With two camfpaths and a tfollowerftoene age: the cam ipathsya'switcli to..direct't hefcl.-;

lower;.;from zone path to the, other,,a;nd;.meens' operatin nsstopn ns. the ma hine: to? ctuate the switch.

1 8:. -,A 'chainstitch inseam shoe sewing netting,

having; ingcombination; stitch forming, devices eluding a, curved hook needle; arranged togenter they work from-the channe1.side,-.1a curved awlzer ranged to enter the work fromtheside; opposite the channel, and, means comprising acam shaft and suitable connections; for .timparting ;W 0 1'h piercing andretracting movements to; the; needle, and .awlduring each stitch fiorming,'cycle ,1 sai d connections including an awlriactuating; cam follower and a cam, provided-with-acampath gaged by: the follower, duringffcrwardj'rotation ot th cam shaft and with a cam path to beengaged by the follower upon'reverse. rotation; ;of the; can shaft to impart an additional?retracting move ment tothe awl. 1 r :v I

9. A chainstitchinseam, shoe sewing having in combination, stitch forming;devices in eluding a curved hook needlearrangedwtogente g "the work-from the channel side, a curvedaWlarrangedto enter the work from the Sidey0Dp01 sitethe channel, means. comprising a canr shaiit; and suitable connections for imparting: work; piercing and retracting movements to-the needle, and awl: duringeach stitch forming cy cle andg means operating, on stopping thegmachine tg impart an-additiona-lretracting movement to-the awl. I .I I "5 10,. A chainstitchinseam shoesew ngmachine; havin in combination-,; stitch forming; devices inf;

cluding -a curved, hookneedle arranged totenten i the W k from the channeLside, a curved awl aiie ranged, to enter the work, from. the side; opposite" the channel' andvmeanspomprising a cam z shait and suitable connections for.;;imparting work; piercing and retracting-movements to the-needle; and awl, during-each stitch forming -cycle;said; connections includingv angawlactuating cam f o -v lowerv and -acam: provided with a cam path; en;

rotation of the'Cam. Shaft, iaridTddfilfieetioils b tweensaid last mentioned'iollower andgth'ejsw ch; for actuating},thesi v'itch; 1 A 

